I think that introducing washers might be counter-productive. If I am understanding the situation, the threads are not tight enough.
Try wrapping the threads of the spikes in teflon tape, available at any hardware store in the plumbing section. This should help fill the gap and who knows we might start a new tweek.
Try wrapping the threads of the spikes in teflon tape, available at any hardware store in the plumbing section. This should help fill the gap and who knows we might start a new tweek.